Nut-lock.



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WILLIAM D. EVANS AND JOSIAII C. WIGGINS, OF EUPORA, MISSISSIPPI.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 712,918, dated November4, 1902.

Application filed March 31, 1F02.

To all whom iff/.may concern.:

, construct a nut-lock which may be used with equally good results uponmetal or upon Wood,` which may be universally used and expeditiously andconveniently applied, and which also when once adjusted cannot be shakenloose.

Another purpose of the invention is to con-` struct the nut-lock in suchmanner that it may be so set that the nut canv be forced by a Wrench, ifdesired, or so that the lock cani be loosened only bythe use of' achisel or similar pointed tool.' Y

The invention consists in thenovel construction" and combination of 'theseveral parts, aswill be hereinafter fully set forth, and pointed out inthe claims.

Reference is to be had to the accompanying drawings, formiu g a part ofthis specification, in which similar characters of. reference in-`dicate corresponding parts'in all theflgures.

Figure 1' is a plan'viewofwhatwe call a spring chuck-Washer used intheconstrue-v tion of the nut-lock. Fig. 2 is an edgepview of the Washershoyvnin'Fig. 1. Fig. 3 is an inner face vieW of the nut used inconnection with the Washer shown in Figs. 1 and 2. Fig. Ltis a sectionthrough the nut. Fig. 5 is a transverse section through a railway-railand fishplates anda s ectional side elevation of the nut-lock employed.Fig 6 is a perspective view ofa slightly-modified form of chuck- Washer.Fig. 7 is a perspective view of the nut used `in connection with theWasher shown in Fig. and Fig. 8 is a perspective view of the countersunkWasher which is used in connection with the nut-lock when it is appliedto objects of Wood.

A represents a railway-rail, and B the fishplates, which fish-plates andthe Web of the Serial No. lO,772. (No model).

rail are provided with the usual openings 10 for the passage of anordinary bolt C. Where the threaded end of the bolt-passes through thefish-plate or other article of metal a countersink 11 is made at theouter end of the opening; but if the bolt be passed'through Wood orother soft material a Washer 12 is employed, (shown in Fig. 8 and havinga central conntersink 13, )which Washer 12 is passed over the'threadedendvof. thev bolt to an engagement with the object through which theybolt extends. v

What we term a chuck-Washer D, (shown in Figs. 1,v 2, 5, and 6,)constitutes a veryimportant factor in the construction of the nutlock.This Washer is made of spring-steel of suitablethiclness and istransversely cut or split, so that a space of predetermined width occursbetween its ends. The outer side surface 14. of the washer isinclined-from its free edge 4in direction of the inner. surface of .theWasher, so that exteriorly the Washer rep- .resents the frustum ofacone; but the inner surface 15 of the Washer is circular andtransversely straight; so that the chuck-Washer inaybe readily4 slidover the threaded end of thebolt C. The chuck-washer D is of such sizeand the bevel of its outer side 14 is such that the Washer Dwill fit inthe countersink V11 or in the countersink 13 of the bearing- Washer 12.l

The front surface of the chuck-Washer D is'flat or rounded, and-at voneend of the Washer a transverse rib 16 is produced upon its front face,which rib may bemore or less sharp or rounded, as shown inv Figs. l and2, or flat, as is illustrated in Fig. 6, while at the opposite end ofthe Washer a sharp inwardlyprojecting spur 17 is made, which extendsbeyond the inner face of the Washer, the inner diameter of thevWasherbeing such as to ad mit of it readily slipping over thebolt withthe vspur 17 near to or practically, in engagement With the bolt. Afterthe tapering surface of the chuck-Washer D is'seated in the countersinkprepared to receive it and the nut E is screwed home on the bolt C, thusforcing the Washer inward, the Washer Will be subjected to a choke grip,and its ends Will be crowded in direction of each other, forcing thespur 17 into the thread of the bolt C, tightly locking the Washer to thebolt IOO and eiectively preventing the latter from turning. The nut E isalso locked in its adjusted position and is prevented from turning byreason of the rib l16 of the chuckwasher D entering one of a series ofgrooves 18 in the inner or contact face of the nut, as is shown in Figs.3, 4, 5, and 7, which grooves radiate from the bore of the nut andextend to its outer side faces.

It will be understood that the cross-sectional shape of the grooves 18will correspond to the cross-sectional shape of the rib on the washer D.When the rib on. the washer D is rounded, as is shown in Figs. l and 2,the grooves in the nut are substantially U-shaped in crosssection, andwhen the rib has entered one of the grooves, the nut being tightened, itis possible for the nut to be unscrewed with a monkey-wrench or suitabletool; but when the rib on the washer D is rectangular in crosssectionand the grooves in the nut have the same crosssectional shape, as isshown in Figs. 6 and 7, when the nut is screwed home and the rib on thechuck-washer enters a groove in the nut it will be impossible to removethe nutthrough the mediu in ofawrench; but the nut may possibly beremoved bythe use of a cold-chisel suitably applied.

It will be observed that the nut-lock described and shown is exceedinglysimple and is effective and that it may be applied wherever a lock for anut is needed.

Having thus described our invention, we claim as new and desire tosecure by Letters Patent- 1. In a nut-lock, a transversely-splitnutwasher of spring material, having a beveled outer side surface andprovided at one end 2. The combination with a countersunkA seat, a boltadapted to be passed through the said seat, a split spring-washer forthe bolt, having its outer side surface beveled to Iit the saidcountersunk seat and provided at one end upon its front surface with aninwardlybent terminal lug, which lug is sharp and extends beyond theinner surface of the washer, and a nut for the bolt, having groovesinits inner or contact face to receive the rib on the washer, for thepurpose described.

3. In a nut-lock, the combination with a beveled seat and a nut havinggrooves in its inner face, of a split spring-washer having its outerside surface beveled, being provided at one end upon its front face witha transverse rib adapted to enter a recess in the nut, the transverserib being of the same cross-sectional shape as the crosssectional shapeot' the groove in the nut, the opposite end of the said Washer beingprovided with an inwardlybent lug extending beyond the inner surface ofthe washer, all combined for the purposes specified.

In testimony whereof We have signed our names to this specification inthe presence of two subscribing witnesses.

WILLIAM D. EVANS. JOSIAH C. WIGGINS.

Witnesses:

LEE WILSON, J No. T. MARSHALL.

